I just had another go at this with 2.6.7. I tried some different thingsthis time.

First I tried taring the filesystem, and that went OK. Then I tried find-exec cat and that was OK, too. Next I did cat /dev/md0, and when thatwas OK I did cat /dev/vg0/home and that also worked. Interestingly, cat/dev/md0 gets about 120-130MB/s throughput whereas cat /dev/vg0/homeonly gets 60-70MB/s.

Fianlly I tried dump again and that hung right away, trace below. Ialso got an ls hung before I made the trace, but that doesn't seem toshow anything new.

A possibly interesting note about the serial console: when I triggeredthe trace, apcupsd lost communication with the UPS, which is using theother serial port (this is while the trace was printing to the console).Communication resumed when it was done printing. The serial ports don'tshare an interrupt, with each other or anything else.